US4343964A - Adhesive coated electrical apparatus having sublimable protective covering and an assembly method - Google Patents

Adhesive coated electrical apparatus having sublimable protective covering and an assembly method Download PDF

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Publication number
US4343964A
US4343964A US06/226,330 US22633081A US4343964A US 4343964 A US4343964 A US 4343964A US 22633081 A US22633081 A US 22633081A US 4343964 A US4343964 A US 4343964A
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US
United States
Prior art keywords
outer sheath
enclosure
vapor
adhesive material
sticky adhesive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/226,330
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English (en)
Inventor
Roy E. Wootton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Department of Energy
Original Assignee
US Department of Energy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by US Department of Energy filed Critical US Department of Energy
Priority to US06/226,330 priority Critical patent/US4343964A/en
Assigned to WESTINGHOUSE ELECTRIC CORPORATION reassignment WESTINGHOUSE ELECTRIC CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WOOTTON ROY E.
Priority to AU74024/81A priority patent/AU7402481A/en
Priority to GB8124746A priority patent/GB2091478A/en
Priority to CA000385884A priority patent/CA1171476A/fr
Priority to JP56146457A priority patent/JPS57129117A/ja
Assigned to UNITED STATES OF AMERICA AS REPRESENTED BY THE UNITED STATES DEPARTMENT OF ENERGY reassignment UNITED STATES OF AMERICA AS REPRESENTED BY THE UNITED STATES DEPARTMENT OF ENERGY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WESTINGHOUSE ELECTRIC CORPORATION
Application granted granted Critical
Publication of US4343964A publication Critical patent/US4343964A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/06—Totally-enclosed installations, e.g. in metal casings
    • H02G5/063—Totally-enclosed installations, e.g. in metal casings filled with oil or gas
    • H02G5/065—Particle traps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49123—Co-axial cable
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4981—Utilizing transitory attached element or associated separate material
    • Y10T29/49812—Temporary protective coating, impregnation, or cast layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/14—Layer or component removable to expose adhesive

Definitions

  • This invention relates generally to electrical apparatus, and more particularly, to an improved particle trapping system in such electrical apparatus which utilizes a sublimable protective coating over an interiorlydisposed permanently sticky adhesive material.
  • High-voltage gas-insulated electrical apparatus typically comprise an outer sheath or enclosure at low or ground potential, an inner electrode or electrodes at high potential disposed within the outer enclosure, and support insulators for insulatably supporting the electrode within the enclosure.
  • An insulating gas is generally utilized to electrically insulate the electrode from the outer enclosure, with the result that the high dielectric strength of the insulating gas enables closer, more compact spacings between the electrode and the enclosure.
  • Sulfur hexafluoride has been utilized as the insulating gas for many reasons associated with its useful combination of vapor pressure, chemical stability, cost, electric strength, thermal conductivity, and non-toxicity, among other properties.
  • the low field regions are created by including within the transmission line conducting electrodes which are electrically connected to the outer sheath and which have portions thereof spaced therefrom, so that a low field region is formed between the electrode and the outer sheath known as particle traps.
  • Adhesive traps may be permanently sticky, or may be initially non-sticky.
  • the permanently sticky adhesive trap involves coating the interior surface of the outer electrode with an adhesive material which is permanently adhesive.
  • permanently adhesive means that the adhesive material is sticky throughout its lifetime, as contrasted to other adhesives which may be non-sticky at times.
  • the non-permanently sticky adhesive traps generally involve a surface film which again is deposited on the interior surface of the outer enclosure, but involves the surface film which is not sticky when deposited and only becomes sticky after the system is filled with the insulating gas, typical of which is sulfur hexafluoride, containing a solvent or softener such as cyclohexane or cyclehexene. This approach has recently run into difficulties in that the electric strength of the insulating gas is adversely affected.
  • the permanently sticky adhesive trap also has problems, in that since the material is always sticky, difficulties in handling, assembling of the equipment, and the like are present.
  • this invention provides electrical apparatus comprising an enclosure, an electrode disposed within and spaced apart from the enclosure, and means for insulatably supporting the electrode within the enclosure.
  • a permanently sticky adhesive material is disposed on the interior surface of the enclosure, and a high-vapor-pressure material is disposed on the adhesive material.
  • the high-vapor-pressure material is capable of subliming away under vacuum, while remaining solid at room temperatures at atmospheric pressure.
  • FIGURE is a sectional view of a gas-insulated transmission line utilizing the teachings of this invention.
  • the transmission line 10 is comprised of an elongated, cylindrical outer sheath 12 at low or ground electrical potential, with an inner conductor or electrode 14 at high electric potential with respect to the outer sheath 12 disposed within the outer sheath 12.
  • the inner conductor 14 would be at an electric potential of, for example, 121-1200 KV and both the outer sheath 12 and the inner conductor 14 would be constructed of a good electrically conducting material such as aluminum.
  • a plurality of insulating supports 16 are utilized for insulatably supporting the inner conductor within the outer sheath 12.
  • an apertured electrode, or particle trapping ring 22 is disposed within the outer sheath 12 adjacent to, and secured to, the insulating support 16, and is electrically connected to the outer sheath 12 by means such as the contact button 23.
  • a permanently sticky adhesive material 26 is Deposited on the interior surface 24 of the outer sheath 12.
  • the permanently sticky adhesive material 26 can, if desired, be deposited only on selected portions of the interior surface 24 such as, for example, the area 28 of the outer sheath 12 opposite the particle trapping ring 22.
  • Covering the permanently sticky adhesive material 26 wherever it may be located is a thin film of a high-vapor-pressure material 30.
  • This thin film cover material 30 is made as thin as possible while allowing the surface thereof to be non-sticky.
  • the cover material 30 is of a high-vapor-pressure material capable of subliming away under vacuum, and more particularly, will be a material which will sublime away (that is, make a transition directly from solid phase into vapor phase) under a vacuum of not more than 1 Torr at a temperature of 0° C. Additionally, the cover material 30 will be a material which will remain solid at a temperature of 50° C. at atmospheric pressure.
  • Two candidate materials which may be utilized as the cover material 30 are camphor and napthalene. Additionally, materials such as those listed below may also be utilized:
  • the transmission line 10 illustrated will, during this commissioning procedure, have the cover material 30 sublime away under this vacuum and then can be removed with the aid of a flow of dried gas through the system if desired.
  • the permanently sticky adhesive material 26 under the cover material 30 will remain behind, thus providing an adhesive trap for any contamination particles within the transmission line 10 while providing for a non-sticky surface during handling, assembly, and initial installation of the transmission line 10.
  • the transmission line 10 can be assembled most preferably by depositing the permanently sticky adhesive material 26 on the interior surface 24 of the outer sheath 12, and then depositing the high-vapor-pressure sublimable cover material 30 on the permanently sticky adhesive material 26.
  • the outer sheath 12, the inner conductor 14, and support means 16 are then assembled to form a transmission line 10, and the transmission line 10 is then transported to and installed in the field.
  • a vacuum is then created in the outer sheath 12, causing the cover material 30 to sublime away, and then the insulating gas 18 is inserted into the outer sheath 12.
  • a flow of dry gas can be circulated through the outer sheath 12 after the vacuum has been created in the outer sheath 12 but prior to the insertion of the insulating gas 18.
  • the adhesive material 26 is permanently sticky after the transmission line 10 has been commissioned, and no additives are required to be in the permanently sticky adhesive film 26 after commissioning. No additives are required to be present in the insulating gas 18 after commissioning, and the adhesive trap, because of the presence of the cover material 30, presents a non-adhesive surface during assembly, cleaning and factory and field assembly. Furthermore, the transition from non-adhesive to adhesive condition is achieved by a vacuum process which is part of the present commissioning procedure, and which therefore does not represent any additional expense.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Insulating Bodies (AREA)
  • Chemical Vapour Deposition (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Installation Of Bus-Bars (AREA)
US06/226,330 1981-01-19 1981-01-19 Adhesive coated electrical apparatus having sublimable protective covering and an assembly method Expired - Fee Related US4343964A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US06/226,330 US4343964A (en) 1981-01-19 1981-01-19 Adhesive coated electrical apparatus having sublimable protective covering and an assembly method
AU74024/81A AU7402481A (en) 1981-01-19 1981-08-12 Adhesive-coated electrical apparatus
GB8124746A GB2091478A (en) 1981-01-19 1981-08-13 Adhesive coated electrical apparatus having sublimable protective covering
CA000385884A CA1171476A (fr) 1981-01-19 1981-09-15 Appareil electrique a enduit collant avec revetement protecteur sublimable, et methode de montage connexe
JP56146457A JPS57129117A (en) 1981-01-19 1981-09-18 Electric device and method of assembling same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/226,330 US4343964A (en) 1981-01-19 1981-01-19 Adhesive coated electrical apparatus having sublimable protective covering and an assembly method

Publications (1)

Publication Number Publication Date
US4343964A true US4343964A (en) 1982-08-10

Family

ID=22848506

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/226,330 Expired - Fee Related US4343964A (en) 1981-01-19 1981-01-19 Adhesive coated electrical apparatus having sublimable protective covering and an assembly method

Country Status (5)

Country Link
US (1) US4343964A (fr)
JP (1) JPS57129117A (fr)
AU (1) AU7402481A (fr)
CA (1) CA1171476A (fr)
GB (1) GB2091478A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985001031A1 (fr) * 1983-08-29 1985-03-14 Yen Yung Tsai Recipient et procede d'emballage a l'abri de la poussiere
US4564721A (en) * 1984-04-18 1986-01-14 Hitachi, Ltd. Gas-insulated electrical apparatus with electret for captivating conductive particles and method of removing such particles during assembly thereof
US5332604A (en) * 1993-04-01 1994-07-26 Yen Yung Tsai Adhesive system for reducing the likelihood of particulate
US20110000697A1 (en) * 2006-10-31 2011-01-06 Mitsubishi Electric Corporation Gas insulated electric apparatus
US20110226503A1 (en) * 2010-03-17 2011-09-22 Bolin Philip C Gas insulated busbar particle trap

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2113764A (en) * 1936-07-18 1938-04-12 Du Pont Manufacture of laminated glass
US3515939A (en) * 1967-07-13 1970-06-02 High Voltage Engineering Corp Dust precipitator
US3553410A (en) * 1968-05-01 1971-01-05 Sprecher & Schuh Ag High voltage switchgear housing with sticky viscous coating for catching metal particles and, thereby protecting the insulators
US3911937A (en) * 1974-02-21 1975-10-14 Westinghouse Electric Corp Adherent coating for captivating small particles in gas-insulated electrical equipment
US4084064A (en) * 1977-09-02 1978-04-11 Westinghouse Electric Corporation Particle trap contact for gas insulated transmission lines
US4160870A (en) * 1972-05-05 1979-07-10 Kabel-Und Metallwerke Gutehoffnungshutte Aktiengesellschaft High voltage device with gas insulation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2113764A (en) * 1936-07-18 1938-04-12 Du Pont Manufacture of laminated glass
US3515939A (en) * 1967-07-13 1970-06-02 High Voltage Engineering Corp Dust precipitator
US3553410A (en) * 1968-05-01 1971-01-05 Sprecher & Schuh Ag High voltage switchgear housing with sticky viscous coating for catching metal particles and, thereby protecting the insulators
US4160870A (en) * 1972-05-05 1979-07-10 Kabel-Und Metallwerke Gutehoffnungshutte Aktiengesellschaft High voltage device with gas insulation
US3911937A (en) * 1974-02-21 1975-10-14 Westinghouse Electric Corp Adherent coating for captivating small particles in gas-insulated electrical equipment
US4084064A (en) * 1977-09-02 1978-04-11 Westinghouse Electric Corporation Particle trap contact for gas insulated transmission lines

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985001031A1 (fr) * 1983-08-29 1985-03-14 Yen Yung Tsai Recipient et procede d'emballage a l'abri de la poussiere
EP0155942A4 (fr) * 1983-08-29 1987-09-08 Yung-Tsai Yen Procede de production de pellicules exemptes de contamination.
US4564721A (en) * 1984-04-18 1986-01-14 Hitachi, Ltd. Gas-insulated electrical apparatus with electret for captivating conductive particles and method of removing such particles during assembly thereof
US5332604A (en) * 1993-04-01 1994-07-26 Yen Yung Tsai Adhesive system for reducing the likelihood of particulate
US20110000697A1 (en) * 2006-10-31 2011-01-06 Mitsubishi Electric Corporation Gas insulated electric apparatus
US8546687B2 (en) * 2006-10-31 2013-10-01 Mitsubishi Electric Corporation Gas insulated electric apparatus
US20110226503A1 (en) * 2010-03-17 2011-09-22 Bolin Philip C Gas insulated busbar particle trap

Also Published As

Publication number Publication date
CA1171476A (fr) 1984-07-24
GB2091478A (en) 1982-07-28
AU7402481A (en) 1982-07-29
JPS57129117A (en) 1982-08-11

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Owner name: UNITED STATES OF AMERICA AS REPRESENTED BY THE UNI

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Effective date: 19811029

Owner name: UNITED STATES OF AMERICA AS REPRESENTED BY THE UNI

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